Check_MK Werk 2443: Fixed quoting of ! in classical nagios checks configured via WATO

ID: 2443 Title: Fixed quoting of ! in classical nagios checks configured via WATO Component: Core & Setup Level: 1 Class: Bug Fix Version: 1.2.7i4 Any <i>!</i> character configured in the WATO rule </i>Classical active and passive Monitoring checks</i> or through the command line via custom_checks was incorrectly quoted. Nagios truncated the command at the !, which lead to unwanted results.